[es6] implement Reflect.apply() & Reflect.construct()

test/mjsunit/harmony/reflect-apply.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-reflect
+
+
+(function testReflectApplyArity() {
+  assertEquals(3, Reflect.apply.length);
+})();
+
+
+(function testReflectApplyNonConstructor() {
+  assertThrows(function() {
+    new Reflect.apply(function(){}, null, []);
+  }, TypeError);
+})();
+
+
+(function testAppliedReceiverSloppy() {
+  function returnThis() { return this; }
+  var receiver = {};
+
+  assertSame(this, Reflect.apply(returnThis, void 0, []));
+  assertSame(this, Reflect.apply(returnThis, null, []));
+  assertSame(this, Reflect.apply(returnThis, this, []));
+  assertSame(receiver, Reflect.apply(returnThis, receiver, []));
+
+  // Wrap JS values
+  assertInstanceof(Reflect.apply(returnThis, "str", []), String);

[arv (Not doing code reviews), 2015/03/03 14:25:52]

Maybe check typeof and Object.getPrototypeOf instead of relying on instanceof
which would pass even if there was an extra object on the prototype chain.

[caitp (gmail), 2015/03/03 15:53:49]

Done.

+  assertInstanceof(Reflect.apply(returnThis, 123, []), Number);
+  assertInstanceof(Reflect.apply(returnThis, true, []), Boolean);
+  assertInstanceof(Reflect.apply(returnThis, Symbol("test"), []), Symbol);
+})();
+
+
+(function testAppliedReceiverStrict() {
+  function returnThis() { 'use strict'; return this; }
+  var receiver = {};
+
+  assertSame(void 0, Reflect.apply(returnThis, void 0, []));
+  assertSame(this, Reflect.apply(returnThis, this, []));
+  assertSame(receiver, Reflect.apply(returnThis, receiver, []));
+
+  // Don't wrap value types
+  var regexp = /123/;
+  var symbol = Symbol("test");
+  assertSame("str", Reflect.apply(returnThis, "str", []));
+  assertSame(123, Reflect.apply(returnThis, 123, []));
+  assertSame(true, Reflect.apply(returnThis, true, []));
+  assertSame(regexp, Reflect.apply(returnThis, regexp, []));
+  assertSame(symbol, Reflect.apply(returnThis, symbol, []));
+})();
+
+
+(function testAppliedArgumentsLength() {
+  function returnLengthStrict() { 'use strict'; return arguments.length; }
+  function returnLengthSloppy() { return arguments.length; }
+
+  assertEquals(0, Reflect.apply(returnLengthStrict, this, []));
+  assertEquals(0, Reflect.apply(returnLengthSloppy, this, []));
+  assertEquals(0, Reflect.apply(returnLengthStrict, this, {}));
+  assertEquals(0, Reflect.apply(returnLengthSloppy, this, {}));
+
+  for (var i = 0; i < 256; ++i) {
+    assertEquals(i, Reflect.apply(returnLengthStrict, this, new Array(i)));
+    assertEquals(i, Reflect.apply(returnLengthSloppy, this, new Array(i)));
+    assertEquals(i, Reflect.apply(returnLengthStrict, this, { length: i }));
+    assertEquals(i, Reflect.apply(returnLengthSloppy, this, { length: i }));
+  }
+})();
+
+
+(function testAppliedArgumentsLengthThrows() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() { }
+  function MyError() {}
+
+  var argsList = {};
+  Object.defineProperty(argsList, "length", {
+    get: function() { throw new MyError(); }
+  });
+
+  assertThrows(function() {
+    Reflect.apply(noopStrict, this, argsList);
+  }, MyError);
+
+  assertThrows(function() {
+    Reflect.apply(noopSloppy, this, argsList);
+  }, MyError);
+})();
+
+
+(function testAppliedArgumentsElementThrows() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() { }
+  function MyError() {}
+
+  var argsList = { length: 1 };
+  Object.defineProperty(argsList, "0", {
+    get: function() { throw new MyError(); }
+  });
+
+  assertThrows(function() {
+    Reflect.apply(noopStrict, this, argsList);
+  }, MyError);
+
+  assertThrows(function() {
+    Reflect.apply(noopSloppy, this, argsList);
+  }, MyError);
+})();
+
+
+(function testAppliedNonFunctionStrict() {
+  'use strict';
+  assertThrows(function() { Reflect.apply(void 0); }, TypeError);
+  assertThrows(function() { Reflect.apply(null); }, TypeError);
+  assertThrows(function() { Reflect.apply(123); }, TypeError);
+  assertThrows(function() { Reflect.apply("str"); }, TypeError);
+  assertThrows(function() { Reflect.apply(Symbol("x")); }, TypeError);
+  assertThrows(function() { Reflect.apply(/123/); }, TypeError);
+  assertThrows(function() { Reflect.apply(NaN); }, TypeError);
+  assertThrows(function() { Reflect.apply({}); }, TypeError);
+  assertThrows(function() { Reflect.apply([]); }, TypeError);
+})();
+
+
+(function testAppliedNonFunctionSloppy() {
+  assertThrows(function() { Reflect.apply(void 0); }, TypeError);
+  assertThrows(function() { Reflect.apply(null); }, TypeError);
+  assertThrows(function() { Reflect.apply(123); }, TypeError);
+  assertThrows(function() { Reflect.apply("str"); }, TypeError);
+  assertThrows(function() { Reflect.apply(Symbol("x")); }, TypeError);
+  assertThrows(function() { Reflect.apply(/123/); }, TypeError);
+  assertThrows(function() { Reflect.apply(NaN); }, TypeError);
+  assertThrows(function() { Reflect.apply({}); }, TypeError);
+  assertThrows(function() { Reflect.apply([]); }, TypeError);
+})();
+
+
+(function testAppliedArgumentsNonList() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() {}
+  var R = void 0;
+  assertThrows(function() { Reflect.apply(noopStrict, R, null); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopSloppy, R, null); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopStrict, R, 1); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopSloppy, R, 1); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopStrict, R, "BAD"); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopSloppy, R, "BAD"); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopStrict, R, true); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopSloppy, R, true); }, TypeError);
+  var sym = Symbol("x");
+  assertThrows(function() { Reflect.apply(noopStrict, R, sym); }, TypeError);
+  assertThrows(function() { Reflect.apply(noopSloppy, R, sym); }, TypeError);
+})();
+
+
+(function testAppliedArgumentValue() {
+  function returnFirstStrict(a) { 'use strict'; return a; }
+  function returnFirstSloppy(a) { return a; }
+  function returnLastStrict(a) {
+    'use strict'; return arguments[arguments.length - 1]; }
+  function returnLastSloppy(a) { return arguments[arguments.length - 1]; }
+  function returnSumStrict() {
+    'use strict';
+    var sum = arguments[0];
+    for (var i = 1; i < arguments.length; ++i) {
+      sum += arguments[i];
+    }
+    return sum;
+  }
+  function returnSumSloppy() {
+    var sum = arguments[0];
+    for (var i = 1; i < arguments.length; ++i) {
+      sum += arguments[i];
+    }
+    return sum;
+  }
+
+  assertEquals("OK!", Reflect.apply(returnFirstStrict, this, ["OK!"]));
+  assertEquals("OK!", Reflect.apply(returnFirstSloppy, this, ["OK!"]));
+  assertEquals("OK!", Reflect.apply(returnFirstStrict, this,
+                                    { 0: "OK!", length: 1 }));
+  assertEquals("OK!", Reflect.apply(returnFirstSloppy, this,
+                                    { 0: "OK!", length: 1 }));
+  assertEquals("OK!", Reflect.apply(returnLastStrict, this,
+                                    [0, 1, 2, 3, 4, 5, 6, 7, 8, "OK!"]));
+  assertEquals("OK!", Reflect.apply(returnLastSloppy, this,
+                                    [0, 1, 2, 3, 4, 5, 6, 7, 8, "OK!"]));
+  assertEquals("OK!", Reflect.apply(returnLastStrict, this,
+                                    { 9: "OK!", length: 10 }));
+  assertEquals("OK!", Reflect.apply(returnLastSloppy, this,
+                                    { 9: "OK!", length: 10 }));
+  assertEquals("TEST", Reflect.apply(returnSumStrict, this,
+                                     ["T", "E", "S", "T"]));
+  assertEquals("TEST!!", Reflect.apply(returnSumStrict, this,
+                                       ["T", "E", "S", "T", "!", "!"]));
+  assertEquals(10, Reflect.apply(returnSumStrict, this,
+                                 { 0: 1, 1: 2, 2: 3, 3: 4, length: 4 }));
+  assertEquals("TEST", Reflect.apply(returnSumSloppy, this,
+                                     ["T", "E", "S", "T"]));
+  assertEquals("TEST!!", Reflect.apply(returnSumSloppy, this,
+                                       ["T", "E", "S", "T", "!", "!"]));
+  assertEquals(10, Reflect.apply(returnSumSloppy, this,
+                                 { 0: 1, 1: 2, 2: 3, 3: 4, length: 4 }));
+})();